Stenciling material.



S. O. EDMONDS.

STENGILING MATERIAL.

APPLICATION FILED NOV. 27, 1912.

1,101,262, Patented June 23,1914.

. I I LA WITNESSES INVENTOR UNITED STATES PATENT OFFICE.

SAMUEL OWEN EDMONDS,'OF NEW YORK, N. Y., ,AS SIG'N bR TO A. .B. DICK COMPANY,

01' CHICAGO, ILLINOIS, LECQBPOBATION OF.ILLINOIS.-

srnxcnme I 1 Specification 9! Letters 2mm.

ratentea uneaa, 1 14.

H n in and liovember 2,7,. 1912. :Serial Io, 73am.

To all whom it may concern: 7

Be it known that I, SAMUEL O. Enmonns, a citizen of the United States, residing in the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Stenciling Materials, of which the following is a specification. a

The object of the present invention is-to simplify and otherwise improve upon the operation of means of flexible stencil-sheets, as well, as .upon the results heretofore obtained by such operation.

The invention is designed particularly, although not exclusively, for use in connection with. stencil-sheets which are commonly dampened as an incident of the stencil-cutting operation thereon. stencil-sheets of this character (and which form nopart of the present invention) are. commonly made by saturating a base of porous fiber such as Japanese Yoshino paper, with a suitable protein, employing, preferably, a tempering 5 agent and a coagulant, such, for example, as

otassium dichromate. A stencil-sheet so ormed is dry but hygroscopic, and while a; legible print may be made by operating upon the same with the type of a writing-machine without previous moistening or dampeningof the sheet, it has been found that better results are obtained by preliminary moistening, whereby the coating is temporarily softened, the drying of the sheet and the consequent shrinkage'of the same about the type characters aiding in the formation of the openings, through which ink may subsequently be passed for the production of multiple copies.

The invention is directed chiefly to two important ends, one being a simple and eflicient means for moistening the stencil-sheet, whereby not only may the type characters be more perfectly formed therein but excessive rupture of the delicate fibers of the Yoshino fabric is avoided, and the other being an effective means for defining ty e characters cut in the stencil-sheet and acilitating the ease with which such characters may be read.

In carrying out the invention in connection with a stencil-sheet, such, for example, as that above particularly referred to, I employ, next adjacent to the sheet and on the side thereof opposite the writing side, a

producing multiple copies by panying drawings, in WhiGh-1-- of-a suitable fabric, such, for examplaassoft paper, muslin, eta, and this I impregnate with. a compound having essentiallytwo characteristics, first, that of remanning moistfor a substantial length of time, and S6Ql1d, fl\8it.0f capacity for transmitting color to the stencil-sheet duripg 5th?! cuttiugoperasion thereon. The in r ients and proportions of such a compoun may be varied within wide limits. As an example .of a practicable compound for use in the connection stated, glyoeripsixty-five per cent,

water thirtyfive per cent. and Turkey-red .011 ten per .cent. may employed, a coloring matter, such, for example, as asoluble pigment or an amlin dye, being added to such:

compoundin such proportion as to give the desired-strength tothe color of the compound as a-whole.

The inventionis lllustrated the accom- Figure 1 is a plan view, illustrating three-part combination'of stencil material employing this invention, while Fig. .2 is a I partial longitudinal section.

In these drawings, A designates the stencil-sheet, which may he ofthe'character 'hereinabove referred to, the writing side of such sheet being outermost in said views.

Directly underlying the stencil-sheet Y and on the side opposite the writing side thereof, is a backing-sheet B, and next below such backing-sheet is a carrier-sheet C, preferably of stifi paper and having,.if desired,

a glazed surface to prevent the dissipation of moisture carried by the backing-sheet B. v If desired, the stencil-sheet A and carrier-sheet C maybe. combined and made into a unitary whole by folding one end 0 of the carrier-sheet C upon the end of the stencil-sheet A and securing all three thicknesses in thisposition by means of a suitable adhesive. This has the advantage of strengthening the forward (or attachment) end of the combination. through which, if desired, perforations c 0' may be formed for coaction with the button-bar of a duplicator. The backing-sheet B" is preferably not secured in position, but is interleaved between the stencil-sheet A and carrier-sheet C just prior to the stencil-cutting opera tion, for it is only then that moistening of the stencil-sheet is required.

As above stated, the stencil-sheet A is dry but hygroscopic. Commonly, also, it

is light in color, it-being, therefore, difiicult for the operator of the writing-machine to readily read type characters which have been impressed thereon. The backing-sheet B furnishes both the moisture'necessary for; the proper cutting of a stencil on such stencil-sheet and the color, which, as a result of the impact of the type, is trans ferred to the stencil-sheet along the lines of type impact, this addition of color along such lines being discernible from the writing side of the stencil and having the eifect of clearly defining the type characters.

It has been heretofore suggested to incorporate a coloring matter in the waxy coating of a stencil-sheet Where the characters are designed to be formed by the expression of the Waxy substance along the lines of type impact. The addition of such' coloring matter, however, makes the stencilsheet opaque, rendering it diflicult, if not impossible, to decipher, through such stenoil-sheet, the usual line marks and other indicating media on the carrier-sheet C. It has also been suggested that the stencil-sheet after being formed be provided with a removable coating, so that the removal of the same along the lines of type impact will render the type characters more easily discernible. This, however, involves an additional operation in the production of the stencil-sheets. It has also been suggested that a backing-sheet be employed in conjunction with a stencil-sheet of the character above referred to, this being impregnatedwith glycerin and water. Here, how- -itielf answers both requirements, 11. 6., that moistening the stencil-sheet and avoiding unnecessary fracture of the fibers thereof and at the same time transferring color to the stencil-sheet along the lines of type impact. Importance is also attached to the use'of Turkey-red oil or its equivalent in the compound for saturating the backingsheet, as this retards the dissipation of the moistening material, keeping the backingsheet for a long period of time in usable condition. 1.

Having now described my invention, What I claim as new therein and desire to secure by Letters Patent is as follows 1. In stenciling material, a backing-sheet impregnated with a compound containing glycerin, Turkey-red oil and a coloring material, substantially as set forth.

2. In stenciling material, a backing-sheet impregnated with a compound containing glycerin, Turkey-red oil, water and a coloring material, substantially as set forth.

This specification signed and witnessed this 26th day of November, 1912.

SAMUEL OWEN EDMONDS.

Witnesses I. Moln'rosn, J. F. COLLIN. 

